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The swinging-bachelor lifestyle of commercial-jingle composer -- and chronic gambler -- Charlie Harper (Sheen) was sorely disrupted when his Malibu beach house was invaded by his uptight brother, Alan (Cryer), and Alan's ten-year-old son, Jake (Jones). Given the childish hedonism of Charlie and the domestic immaturity of the soon-to-be-divorced Alan, young Jake turned out to be the true "grown-up" in the Harper household. Also seen from time to time were Marin_Hinkle as Alan's ex-wife Judith (who may or may not have been gay); Melanie_Lynskey as Charlie's erstwhile lover and next-door neighbor Rose; and Holland_Taylor (replacing the pilot episode's Blythe_Danner) as Charlie and Alan's control-freak mother, Evelyn.

Synopsis:
The swinging-bachelor lifestyle of commercial-jingle composer -- and chronic gambler -- Charlie Harper (Sheen) was sorely disrupted when his Malibu beach house was invaded by his uptight brother, Alan (Cryer), and Alan's ten-year-old son, Jake (Jones). Given the childish hedonism of Charlie and the domestic immaturity of the soon-to-be-divorced Alan, young Jake turned out to be the true "grown-up" in the Harper household. Also seen from time to time were Marin_Hinkle as Alan's ex-wife Judith (who may or may not have been gay); Melanie_Lynskey as Charlie's erstwhile lover and next-door neighbor Rose; and Holland_Taylor (replacing the pilot episode's Blythe_Danner) as Charlie and Alan's control-freak mother, Evelyn.

After his memories return, Tsukasa orders Nobuhiko to summon every Rider for a tournament to determine the strongest one. After numerous matches, it comes down to a 6-man tag team match between the team of Decade, Kuuga, and Diend vs. V3, BLACK, and Super-1. Upon victory, Tsukasa and company end up into a giant castle with Yusuke and Natsumi finding themselves in the throne room surrounded by monsters. Eijiro appears shortly after, only to reveal himself as Doctor Shinigami. Yusuke and Natsumi learn that they are in Dai-Shocker's base of operations as the organization welcomes Tsukasa's return as Dai-Shocker's leader.-

Source: http://en.wikipedia.org/wiki/Kamen_Rider_Decade:_All_Riders_vs._Dai-Shocker